Method and apparatus for motional/vibrational energy harvesting via electromagnetic induction using a magnet array

a technology of electromagnetic induction and electromagnetic induction, which is applied in the direction of electrical apparatus, dynamo-electric components, dynamo-electric machines, etc., can solve the problems of affecting the performance of the miniaturized device, and often nw-w level, etc., to achieve good shielding and large voltage
US20110140458A1Inactive Publication Date: 2011-06-16UNIV OF FLORIDA RES FOUNDATION INC
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Patent Information

Authority / Receiving Office
US ¡ United States
Patent Type
Applications(United States)
Current Assignee / Owner
UNIV OF FLORIDA RES FOUNDATION INC
Publication Date
2011-06-16
Estimated Expiration
Not applicable ¡ inactive patent

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Abstract

Embodiments of the subject invention pertain to a method and apparatus for vibrational energy harvesting via electromagnetic induction using a magnet array. Specific embodiments of the subject invention incorporate at least one conductive coil and at least one magnet array. Magnets used in such magnet arrays can be permanent magnets of various shapes, such as arc-shaped, square, rectangular, wedge, or trapezoidal. These magnet arrays can then be, for example, circular, hexagonal, rectangular, or square in external shape and create various types of internal magnetic fields, such as dipole, quadrupole, hexapole, or octapole magnetic fields. Through use of a magnet array, embodiments of the invention can increase the strength of magnetic fields by approximately 10 times compared to typical vibrational energy harvesters. The 10 time increase in the strength of the magnetic fields can result in up to a 100-fold increase in power. Preferably, the magnetic fields created by the subject device are substantially, if not completely, enclosed within the device.
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Description

CROSS-REFERENCE TO RELATED APPLICATION(S)

[0001] The subject application claims the benefit of U.S. Provisional patent application No. 61 / 286,621, filed Dec. 15, 2009 which is hereby incorporated by reference herein in its entirety, including any figures, tables, or drawings.BACKGROUND OF INVENTION

[0002] Long lasting, high power density power sources are important to enable emerging technologies such as wireless sensor networks, robotic platforms, and electronic devices for consumer, military, medical, aerospace and other applications. To meet the energy demands for these applications, devices that scavenge power from the environment (e.g., solar, thermal, vibrations) are of great practical interest. Various energy harvesting and scavenging methods exist for capturing and storing energy from normally occurring environmental sources, such as thermal, solar, or vibrational. For applications on moving platforms, vibrational energy harvesters are advantageous since solar or thermal energy ...

Claims

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